Saturday Night Live pushed the envelope last night with a drop-dead impression of Gov. Paterson that mocked his blindness and past drug use. The skit features SNL castmember Fred Armisen as Paterson during a segment on "Weekend Update." Like disgraced Illinois Gov. Rod Blagojevich, Paterson must appoint someone to the senate seat being vacated by Sen. Hillary Clinton. Blagojevich was arrested last week for trying to sell the seat left open by President-elect Barack Obama. Armisen, as Paterson, says he has three criteria: economic experience, upstate influence and someone with a disability who is completely unprepared for the job -...